Subject:
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Re: Handyboard low voltage motor control
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 18 Oct 1999 19:02:11 GMT
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Viewed:
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624 times
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That'll work, of course, but that also means I'll be dissapating about 8
volts at .5A through the resistor...
Gary Livick wrote in message <380B55B1.1C3703C4@pacbell.net>...
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> How about a resistor in series?
>
> Gary Livick
>
>
>
> Paul Dito wrote:
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> > Hi All,
> >
> > Most of you guys seem to want more power to control motors, well, I want • to
> > go the other way. I'm looking to drive 1.5v motors with the handyboard.
> > The lowest voltage the L293 can take is 4.5v (Vmin of Vcc1), and that • still
> > has my motors screaming, even with the minimum PWM from the controller.
> > Obviously I can take the outputs of the handyboard to my own H bridge, • but
> > I'm looking for an easier way out...
> >
> > Thanks,
> > Paul
>
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Message has 1 Reply:
 | | Re: Handyboard low voltage motor control
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| Good point... There is another way. You can build your own h-bridges using mechanical relays and maybe a few diodes. They drop zero volts, which is good. However, you obviously can't PWM the things. If you just want rudimentary speed control, you (...) (25 years ago, 18-Oct-99, to lugnet.robotics.handyboard)
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